I have Windows 10 booting via NVME on a Samsung 950 Pro.
BIOS version: N51 Ver. 01.21 03/02/2016
I beleive I am using BIOS defaults.
Option ROM Launch Policy is set to "ALL UEFI"
I don't see the Samsung M.2 950 Pro in the BIOS boot menu device list but it boots nicely into Windows 10.
The M.2 950 Pro is the only storage device in the PC
Model of the PC is: HP Z240 Tower Workstation
SKU is: L9K19UT#ABA (I am in Canada)
Perhaps its simply fixed in this version of the BIOS